method EventSource.addEventListener
K extends keyof EventSourceEventMap
type: K
listener: (this: EventSource, ev: EventSourceEventMap[K]) => any
optional
options: boolean | AddEventListenerOptions
listener: (this: EventSource, event: MessageEvent) => any
optional
options: boolean | AddEventListenerOptions
listener: EventListenerOrEventListenerObject
optional
options: boolean | AddEventListenerOptions